Mahabharata 12.274.1

युधिष्ठिर उवाच · yudhiṣṭhira uvāca

पितामह महाप्राज्ञ सर्वशास्त्रविशारदअस्ति वृत्रवधादेव विवक्षा मम जायते

pitāmaha mahāprājña sarvaśāstraviśāradaasti vṛtravadhādeva vivakṣā mama jāyate

Our plain-language meaning of this verse is waiting for scholar review.